IDEAL, Wire Connector, Wire-Nut®, Twist-On, Number Of Conductors: 2, 4, Conductor Range: 18 - 12 AWG, Min 2-18 MAX 4-14 w/ 1-18, Material: Flame-retardant polypropelene, Color: Yellow, Voltage Rating: 600 V, Environmental Conditions: Tough, UL 94V-2 Flame-Retardant Shell Rated At 105 DEG C (221 F), Model Number: 74B, Flammability Rating: UL 94V-2